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| ; RUN: opt < %s -S -loop-unroll -mtriple aarch64 -mcpu=falkor | FileCheck %s
; RUN: opt < %s -S -loop-unroll -mtriple aarch64 -mcpu=falkor -enable-falkor-hwpf-unroll-fix=0 | FileCheck %s --check-prefix=NOHWPF
; Check that loop unroller doesn't exhaust HW prefetcher resources.
; Partial unroll 2 times for this loop on falkor instead of 4.
; NOHWPF-LABEL: @unroll1(
; NOHWPF-LABEL: loop:
; NOHWPF-NEXT: phi
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: icmp
; NOHWPF-NEXT: br
; NOHWPF-NEXT-LABEL: exit:
;
; CHECK-LABEL: @unroll1(
; CHECK-LABEL: loop:
; CHECK-NEXT: phi
; CHECK-NEXT: getelementptr
; CHECK-NEXT: load
; CHECK-NEXT: getelementptr
; CHECK-NEXT: load
; CHECK-NEXT: add
; CHECK-NEXT: getelementptr
; CHECK-NEXT: load
; CHECK-NEXT: getelementptr
; CHECK-NEXT: load
; CHECK-NEXT: add
; CHECK-NEXT: icmp
; CHECK-NEXT: br
; CHECK-NEXT-LABEL: exit:
define void @unroll1(i32* %p, i32* %p2) {
entry:
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %inc, %loop ]
%gep = getelementptr inbounds i32, i32* %p, i32 %iv
%load = load volatile i32, i32* %gep
%gep2 = getelementptr inbounds i32, i32* %p2, i32 %iv
%load2 = load volatile i32, i32* %gep2
%inc = add i32 %iv, 1
%exitcnd = icmp uge i32 %inc, 1024
br i1 %exitcnd, label %exit, label %loop
exit:
ret void
}
; Partial unroll 4 times for this loop on falkor instead of 8.
; NOHWPF-LABEL: @unroll2(
; NOHWPF-LABEL: loop2:
; NOHWPF-NEXT: phi
; NOHWPF-NEXT: phi
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: add
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: add
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: add
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: add
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: add
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: add
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: add
; NOHWPF-NEXT: getelementptr
; NOHWPF-NEXT: load
; NOHWPF-NEXT: add
; NOHWPF-NEXT: add
; NOHWPF-NEXT: icmp
; NOHWPF-NEXT: br
; NOHWPF-NEXT-LABEL: exit2:
;
; CHECK-LABEL: @unroll2(
; CHECK-LABEL: loop2:
; CHECK-NEXT: phi
; CHECK-NEXT: phi
; CHECK-NEXT: getelementptr
; CHECK-NEXT: load
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: getelementptr
; CHECK-NEXT: load
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: getelementptr
; CHECK-NEXT: load
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: getelementptr
; CHECK-NEXT: load
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: icmp
; CHECK-NEXT: br
; CHECK-NEXT-LABEL: exit2:
define void @unroll2(i32* %p) {
entry:
br label %loop1
loop1:
%iv1 = phi i32 [ 0, %entry ], [ %inc1, %loop1.latch ]
%outer.sum = phi i32 [ 0, %entry ], [ %sum, %loop1.latch ]
br label %loop2.header
loop2.header:
br label %loop2
loop2:
%iv2 = phi i32 [ 0, %loop2.header ], [ %inc2, %loop2 ]
%sum = phi i32 [ %outer.sum, %loop2.header ], [ %sum.inc, %loop2 ]
%gep = getelementptr inbounds i32, i32* %p, i32 %iv2
%load = load i32, i32* %gep
%sum.inc = add i32 %sum, %load
%inc2 = add i32 %iv2, 1
%exitcnd2 = icmp uge i32 %inc2, 1024
br i1 %exitcnd2, label %exit2, label %loop2
exit2:
br label %loop1.latch
loop1.latch:
%inc1 = add i32 %iv1, 1
%exitcnd1 = icmp uge i32 %inc1, 1024
br i1 %exitcnd2, label %exit, label %loop1
exit:
ret void
}
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